The no start when warm can be due to the valves being out of adjustment. 4 thou intake and 5 thou exhaust. Try starting with the choke partially on. If this helps then the pilot jet is to small.
The fuel flowing out of the carb can be that the float level is to high or this does happen from vigorusly kicking the bike.
The 3/4 throttle can be helped by changing the needle clip position. Experimant by going up or down a position. Do this after the hard start problem is corrected.
Steve in SF
87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project